PURPOSE: To reduce the cost of equipment by unifying the management of sales data of a guest room refrigerator and charging data of a chargeable television in a hotel., etc.

CONSTITUTION: A turn-on/turn-off signal of a switch which becomes the base of use time data of a chargeable television 4 installed in a guest room 1 is transmitted to the front desk 9 through a terminal machine 2 for inputting sales data of a refrigerator 5. That is, a transmission function of the terminal machine 2 for the refrigerator is utilized for the transmission of chargeable television charging data, as well, the transmission function is excluded from a selector, and also, a signal leased line for the chargeable television 4 becomes unnecessary. Also, this system is constituted so that an input key for transferring various information such as the guest room cleaning end, etc., is integrated together into the guest room terminal machine 2 for the refrigerator, and its information is transmitted to an information processor 10 of a front desk office 9 through the common guest room terminal machine 2. Accordingly, not only the transmission line can be combined, but also a special push-button fitting means of an operating panel, etc., becomes unnecessary, and the cost of equipment becomes low. Moreover, since various operating keys are collected to the common terminal machine 2, the operability is improved.